.png){kind=icon}
.png){kind=icon}
Return
Ultrahigh areal capacity aqueous zinc pouch cell enabled by proton scavengers
.png){kind=icon}
PRE
AI
X
J
J
Y
Y
K
Y
DOI：10.1016/j.mattod.2026.103372.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
The development of aqueous zinc metal batteries has been severely hindered by the hydrogen evolution reaction (HER), especially at commercial-level areal capacities (>4 mAh cm−2). Herein, we highlight a polyoxometalate-doped PEDOT layer that acts as a proton scavenger for the zinc anode, mitigating HER and enabling Ah-level zinc pouch cells at an ultrahigh areal capacity of 37.2mAh cm−2. Polyoxometalates serve as counterions in PEDOT and during zinc plating, the redox behavior of the polyoxometalates promotes spontaneous proton adsorption, enabling proton scavenging which consumes interfacial hydrogen species and lowers the local proton activity, even outperforming the original polyoxometalate. Additionally, this polyoxometalate-doped PEDOT layer efficiently homogenizes the electric-field distribution, significantly inhibiting dendrite initiation. Consequently, the protected Zn||I2 full cell achieves ∼ 100% capacity retention over 20,000 cycles. Furthermore, a high-energy anode-free zinc metal battery configuration with protection enables stable cycling for over 650 cycles at a practical specific energy of 272 Wh kg−1. More importantly, 1.34-Ah pouch cells featuring an ultrahigh areal capacity of 37.2 mAh cm−2 are further validated, demonstrating the potential for industrial-scale production of zinc metal batteries. This work not only advances the fundamental understanding of interfacial electrochemistry but also pushes a step forward towards designing next-generation, high-stability aqueous zinc metal batteries.
Keywords:
proton scavenger
aqueous zinc metal battery
polyoxometalate
hydrogen evolution reaction
zinc anode
Journal
M
IF:
22
Papers:
279
Citations:
0
Organization
Cited Papers